| Bug ID | 103142 |
|---|---|
| Summary | R600g+sb: optimizer apparently stuck in an endless loop |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/r600 |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | gw.fossdev@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 134738 [details]
TGSI, byte code and logging output
With sb enabled some shaders apparently trigger an endless loops in the sb
optimizer.
The attached TGSI and log of a shader triggering this behaviour comes from the
Unreal Editor version 4.17.1,
The log was created with
#define PSC_DEBUG 1
in src/gallium/drivers/r600/sb_sched.cpp
The problem is probably related to the "FIXME rework this loop" on line 1808 in
the same file, and I also have the impression that it has something to do with
MULADD when the sources are a mix of CONST and IMM.
I'd try to fix it myself, but right now I don't really have a clue how to
approach this bug.
best,
Gert
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